undeveloped
adjective
uk/ˌʌndɪˈveləpt/ usnot developed, used, or advanced:
Rhum is the UK's largest undeveloped gas field.
ECONOMICS
used to describe countries that are much less developed economically than most others, with very little industry, and with little money spent on education, health care, etc.:
This ailment is common in undeveloped countries without proper water and sewer systems.
Compare
underdeveloped country
PROPERTY
undeveloped areas are not used for farming or industry, or do not have any buildings on them:
The country's east coast remains relatively undeveloped.
We have very little undeveloped green space left in Louisville.